chore(deps): Update actions/setup-python action to v6

Author: cq-bot

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"
       - name: Install dependencies

.github/workflows/unittests.yml

@@ -19,7 +19,7 @@ jobs:
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"
       - name: Install dependencies